The reaction of 9-phenylthioxanthylium salt (II) with a mixed acid gave dinitrated II in 91% yield. In order to determine the structure of dinitrated II, 4-nitro-9-(m-nitrophenyl) thioxanthene (IV), 4-acetamido-9-(p-acetamidophenyl) thioxanthene (VI), 2, 4-dinitro-9-phenylthioxanthene (XV), and their ralated compounds were synthesized. And it was confirmed that the dinitration of II gives 4-nitro-9-(m-nitrophenyl) thioxanthylium and 4-nitro-9-(p-nitrophenyl) thioxanthylium salts in the ratio of formation being 1.0 : 1.2. Thus, it was recognized that the nitration of II occurs in the phenyl group at 9-position and then at 4-position in the hetero ring of II.
9-苯基
硫杂
蒽盐(II)与混合酸反应得到二硝基 II,收率为 91%。为了确定二硝基 II 的结构,合成了 4-硝基-9-(间
硝基苯基)
噻蒽(IV)、4-乙酰
氨基-9-(对乙酰
氨基苯基)
噻蒽(VI)、2,4-二硝基-9-苯基
噻蒽(XV)以及它们的衍生化合物。结果证实,II 的二硝化反应生成了 4-硝基-9-(间
硝基苯基)
硫氧杂蒽盐和 4-硝基-9-(对
硝基苯基)
硫氧杂蒽盐,生成比例为 1.0 : 1.2。因此,人们认识到 II 的硝化发生在 II 的杂环上 9 位的苯基上,然后是 4 位。